Another approach could be too simply pass the labelled indices in a dict as
a third/fourth positional argument.
So for indexing
b = arr[1, 2, a=3, b=4]
Instead of
__getitem__(self, (1, 2), a=3, b=4)
Just do
__getitem__(self, (1, 2), {'a': 3, 'b': 4})
On Mon, Aug 3, 2020, 16:46 Christopher Barker <python...@gmail.com> wrote:
>
> Yes, that would be correct. However, the function could instead be defined
>> as:
>>
>> def __getitem__(self, index, /, **kwargs):
>> ...
>>
>> and then there'd be no conflict (as "self" and "index" must be passed
>> positionally). In effect, the naive spelling (which permits self and
>> index to be passed as keywords) would be a subtle bug that could
>> easily be corrected.
>>
>
> sure, but it would be a bug in a LOT of existing code!
>
> I wonder, if this were to be introduced, if the interpreter could have a
> special case that would call __getitem__ in a special way to avoid this bug
> in old code.
>
> -CHB
>
>
> --
> Christopher Barker, PhD
>
> Python Language Consulting
> - Teaching
> - Scientific Software Development
> - Desktop GUI and Web Development
> - wxPython, numpy, scipy, Cython
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